[size=16]This month marks 24 years since Michael Crichton's long running medical drama ER made its debut. The series, which followed the doctors and nurses working in the emergency department of Chicago County General, was hugely popular with both critics and audiences, and ran for an impressive 15 series.

To celebrate this anniversary, here's a look at what 18 of the principal cast members have been doing since the left the show.

Click on each of the flip-cards to get a look at them in a recent role.

Laura Innes (Kerry Weaver)

[size=16]After ER, Laura Innes' first big role was in short-lived science fiction series The Event. She also starred in mini-series Awake, and she recently had a guest arc on alien invasion drama Colony.

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Maura Tierney (Abby Lockhart)

[size=16]After she left ER in 2009, Maura Tierney was supposed to star in drama Parenthood, but after being diagnosed with breast cancer, she decided to pull out of the project. She was replaced by Gilmore Girls actress Lauren Graham.

After undergoing treatment, Tierney returned to work in 2010, and has been going from strength to strength since. She had a guest arc on The Good Wife, and then won a lead role on the hugely popular drama The Affair.

Next, we'll see her in the Oscar hopeful Beautiful Boy, which is about a family's struggle with their son's addiction. It also stars Steve Carell and Timothee Chalamet.

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Goran Visnjic (Luka Kovac)

[size=16]Croatian-American actor Goran Visnjic has a long list of post-ER credits to his name. After playing Luka Kovac, he's been in TV series Pan Am, Timeless and Extant, as well as films The Counsellor and The Girl with the Dragon Tattoo.

Anthony Edwards (Mark Greene)

Anthony Edwards recently starred as a judge on the miniseries Law and Order: True Crime.

[size=16]The beloved Mark Greene died on ER, but Anthony Edwards returned to film a flashback scene for the final ever episode. He's also starred in serial killer movie Zodiac, and he made a guest appearance in comedy Girls.

Most recently, Edwards starred in miniseries Law and Order: True Crime.

Julianna Margulies (Carol Hathaway)

[size=16]After she left ER, Julianna Margulies won the lead role on TV series The Good Wife, which is about a former lawyer who returns to work when her state attorney husband is caught up in a sex and corruption scandal, and sent to prison. It ran for seven seasons (winning Margulies two Emmys and a Golden Globe), eventually finishing in 2016.

Since then, she's been in comedy Dietland, and she's currently filming The Hot Zone, which is a science fiction series about the spread of the ebola virus.

Ming-Na Wen (Jing-Mei Chen)

[size=16]Ming-Na Wen starred on Agents of S.H.I.E.L.D for five years, and she was also in Two and a Half Men. She's guest starred in Fresh off the Boat, and she will reprise her role as Mulan for upcoming Disney movie Ralph Breaks The Internet.

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Scott Grimes (Archie Morris)

[size=16]Scott Grimes played Will Scarlett in the Russell Crowe version of Robin Hood, and he's a voice actor on both Family Guy and American Dad. He's also guest starred on NCIS, Suits, Criminal Minds and Shameless.

Nowadays, Scott stars in science fiction comedy The Orville.

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George Clooney (Doug Ross)

[size=16]George Clooney's career took off after he left ER, and he's starred in a multitude of Hollywood films. He's been nominated for Oscars in six different categories (a record that only Walt Disney shares), and he's also a devoted activist.

While he hasn't acted for a couple of years, he's set to make his TV return next year with an adaptation of classic novel Catch 22.